Cleaning device for coil, systems



. April 27, 1937. v E STAHL 2,078,740

' CLEANING DEVICE FOR COIL SYSTEMS Filed Aug. 6, 1955 JNVENTOR 5 7/; 522/.

ATTORNEY @aientecl Apr. 27, 1937 o UNl'lE err CLEANING DEVICE FOR COIL SYSTEMS Emil Stahl, Jersey City, N. J.

Application August 6, 1935, Serial No. 34,881

2 Claims. (01. 225-13) This invention relates to an improvement in located between its point of connection to the cleaning devices for pipe coil systems, and parcylinder and the point at which it is connected ticularly for those systems used for cooling beverto pipe l8. Pipe I9 is provided at its end with ages such as beer, cider, milk and the like, which a threaded union 2|] by which it may be connected because of the nature of the liquids passing to the end of the coil to be cleaned, shown at 23. 5 through the coils, require periodic cleaning not Coil 23 is usually connected by a suitable pipe only for the purpose of providing a clear and line to a spigot or tap 24. clean passage for the liquid, but for reasons of The operation of the cleansing device is as sanitation. follows:

10 The object of the invention is to provide a The union 2B is connected to the end of the 10 cleaning device of this character which uses water coil 23, thereby coupling the coil with pipe l9. only, as its cleaning medium, and which, by a Pipe l4 then has its "end placed in a receptacle novel manipulation of a body of water, creates of water, indicated at 26 in Fig. 3. Gate valve both a suction and a frictional force tending to 22 is closed and tap 24 is opened. Pump is operloosen and completely remove sediment, slime, ated, this action drawing'water from supply 26, 15 bacteria, and any foreign matter gathering in the forcing it through pipe 16, through connecting coils. With this improved arrangement, the use pipe l8, into pipe [9, through the coil 23 and out of cleansing fluids, preparations, acids and the of the open tap 24. When water begins to flow like is completely dispensed with so that the inner out of the open tap 24, the gate valve 22 is then 2() surfaces of the coil are, after the cleaning operamanually opened and this action stops normal tion, left not only thoroughly clean, but unconpumping action. When the pump is then reciptaminated. rocated, with gate valve 22 in open position, the

More particularly, the invention contemplates body of water then in the coil 23 is, on every upthe utilization of a relatively small, hand-operstroke of piston ll, drawn back into the pump 5 ated pump so connected to the coil that water and. on every down stroke is forced through the 25 may first be forced through the coil, then a body coil, so that a body of water is, during operation of water maintained in the coil and drawn back of the pump with valve 22 in open position, moved and forth in the coil by pump manipulation until backward and forward or reciprocated through all sediment, slime and other accumulation in the the coil. While this is occurring valve I 5 is precoil and connected pip g has been loosened, venting flow of water from the source of supply 30 whereupon the body of water and the loosened 26. It has been found that this reciprocating accumulation is discharged leaving the coil and movement imparted to a body of water applies piping completely clean and ready for further use. both a suction force and a frictional action on In the accompanying drawing, wherein an 11- the inner surfaces of the coil and connected piplustrative embodiment of the invention is shown, ing, which renders these surfaces exceptionally 35 1 is a sectional View on the line l-l of clean, loosening all sediment, slime and all other 2 looking in the direction of t e ar w of accumulations. After the pump has been manipa cleaning device constructed in accordance with m t for relatively short time, valve 22 is the invention; Fig. 2 is a vertical sectional View manually closed and the next pump manipulation through the p p; a Fig. 3 is a diag a will deliver the stream of water out of tap 24 40 View of the cleaning device attached to a Coil together with all of the sediment and other acand in readiness f the Cleaning Operation cumulation loosened by the cleaning operation In the drawing 10 indicates the body or cylinder ju t de cribed. The pumping of water through of a cenventie el form of hand-Operated p p the system, with valve 22 closed, is then continued within which t e piston l l s reeiploeeted in the until the entire system is cleaned, the entire oper- 45 usual manner y means of the piston d 25 and ation consuming but a matter of minutes and attached handle l3. A base or foot plate I 2 is resulting in thorough and complete cleaning attached to the lower end of the cylinder It). t t th use of chemicals or other contami- Connected to the cylinder ID at a point below the hating influences,

piston H is a pipe I4 in which is located a check What I claim is: 50 valve l5. Also connected to the cylinder is a 1. An apparatus of the character described pipe '6 in which the check valve I1 is 1002,1366 comprising a pump a, ater supply pipe con- The end o e p p l6 beyehd Check Valve is nected to the pump, a check valve interposed in joined by p pe 3 to p l9 which is Connected said pipe between the source of water supply to the cylinder [0 and which has a gate valve 22 and the pump, a pipe leading from the pump for 55 T GFFICE attachment to the end of a coil to be cleaned, a third pipe connected to the pump and also to the second pipe, at check valve located in the third pipe, and a manually operated valve in the second 5 pipe, said manually operated valve being located in said pipe between its point of connection to the pump andits point of connection with the third pipe.-

2. An apparatus of the character described 10 comprising a pump having three pipes extending from it, the first of said pipes leading to a source of water supply, a check valve in said pipe, the second pipe leading to a coil to be cleaned, and the third pipe connecting the pump with the second pipe, a gate valve located in the second pipe between the pump and the poirit of connectiori of the Second pipe with the third pipe, and a. check valve in the third pipe between the point of connection of the third pipe with the pump and its connection with the second pipe. 

